Yesterday, while I was at Target I noticed the GM Halloween cereals were 50% off and priced at $1.33. These are good sized boxes and if you're a fan of these varieties I'd scoop them up now as they only seem to be around this time of year.
I forgot to check the expiration dates but you can freeze the cereal to make it last a lot longer – it doesn't freeze solid and can be eaten right out of the freezer!
There were quite a few boxes at my Target so they may still be around by the time everything goes 75% off but you never know.
Remember prices may differ between areas but check your local Target for these money savers. Items may not be available at all stores.